#include <iostream>
#include <cstdio>
using namespace std;
#define N 21252
int main(){
	int p,e,i,d,caseNo=0;
	while (cin >> p >> e >> i >> d && p!=-1){
		++ caseNo;
		int k;
		for(k=d+1;(k-p)%23;++k);
		for(;(k-e)%28;k+=23);
		for(;(k-i)%33;k+=23*28);
		cout<<"case"<<caseNo<<
		":the next triple peak occurs in "<<k-d<<"";
	}
	return 0;
	
}
